Pipe-unscrewing socket



, Sept 16, 1930- F. J. HINDERLITER 1,776,024

f PIPE-UNSCREWING SOCKET Filed oct. 19, 1.927

Patented Sept. 16, 1930 z Unirse STATES PATENT OFFICE PIPE-UNSCREWING SOCKET for removing pipe sections from a well, and more particularly to a device which may be termed an unscrewing socket adapted `to embrace a section of pipein `a well casing, whereby thissection maybe unscrewed and disconnected from vthe lowermost sections.

An object of the present invention resides in the provision of a socket adapted to be nr lowered in a well casing without disturbing the string of piping thereinand adapted to embrace one of the sections comprising said string, whereby this section may be unscrewed from the section immediately therebelow.'

Another object of this invention is the provision of an unscrewing socket for well piping including a milling surface adapted to mill its way over the end of the upper T section of piping, whereby the socket will slide downwardly over the piping.

A furthery object of the I invention is the provision of an unscrewing lsocket for well piping khaving its lower end 'provided `with a plurality of teeth adapted to bite into the top edge of the uppermost coupling, whereby this coupling may be removed from the well with the section of piping disposed thereabove. A `V f 32S A still further object ofmy invention has to do with the provision of an unscrewing socket for well piping includingV an eccentric wedge having a toothed surface adapted to bite into the wall of thesection of pipe to 3be removed fromthe well. l

Otherobjects and advantages of my invention will more fully appear from the followingdetailed description taken 1n connecj tion with the accompanying drawing, which 4Qillustrates several embodiments thereof and in which?"` i j Y Figurel 1 is a fragmentary vertical sectionalfview through a well, casing and the socket of my invention showing the socket in cooperation with va section of piping to be removed from the casing; j

Figure 2 is an enlarged cross-sectional view taken through'my novel socket on substantially theline'II-II of Figure 1 look- "n ing downwardly andshowing the position The present invention has to do with means Application 1e`d October 19, 1927. Serial No. 227,196.

of the slip operation;

Figure 3 is a cross-sectional view similar to Figure 2 illustrating the position of ther wedge after the socket has been turned in the direction indicated by the arrow;

Figure et is a crosssectional view similar to Figure 3 illustrating a slip adapted for use in connection with piping having left 0r wedge prior to the unscrewing lhand threads and showing the position of the slip when the socketl is turned in the direction indicated by the arrow;

Figure 5 is an enlarged vertical sectional view through the socketof my invention;

Figure 6 is a bottom end view of the socket; 65

Figure 7 is a vertical sectional view through a. modified form of socket adapted to be lowered inside of the piping to be removed from the well; y I

Figure 8 is a cross-sectional viewl through 10 this modified form of socket showing it applied to a pipe drawn to a `reduced scale, and

'Figure 9 is a bottom end view of the socket shown in Figure 7 drawn to a reduced scale.

In the drawings, like reference characters designate similar parts throughout the several views. r

The reference character 10 designates genc erally the socket of my invention which comprises a tubular body 11 `having its upper end 80 provided withfa threaded countersunk opening 12 adapted to have threaded therein the y lower reduced end 14 of a bowl or tube 13.

This bowl has an annular tapered'slip seat 15 adapted'to accommodate a plurality of slips 85 16 secured to lowering reins 17. These slips,

jas will `be more fully explained hereinafter,

are adapted to be lowered by means ofthe reins 17 into the spacebetween the annular seat and the pipe section 18, whereby the pipe 9 4section 18 may berigidly anchored to the socket 10, thus enabling this pipe section and .the socket to bei removed together from the i wellcasing 19` The upper end ofthe pipesection is shown as being broken and provided with a ragged or rough edge 20. Thelower end of this section 18 is threaded into the top of a pipe `coupling 21 which has also threaded into it l 'a lower pipe section 22. In Figure 1 the mi y ,socket 1o isrshdwnin"apbsifion ready mais Y connect thelrpipe fcou'pling`21 from Vthe pipe iseetion 22, Wherebythe section! 1 8f. and the 'i yCoupling 2l The lower'en' fthe VVsocket,'body iris" Y i eountersurik, as-indicate'det 214; surface othis'enjcl of the bodyiodeflnmgf the coun'te'rsuk openngis provided with @ling "10 of teeth 25; These teethare made-ofsuelr a mill,v the purpose" of Whiohyvl lo n,

fgjfully explained hereinaftera j -'An intermed'a'te portiorilofotheloody `V1 1 tail' shape 'and lis Y.adapted 'to reeeiye an L it toibo. sli-dablygmountedfn Slot-26,11 will tubular loody'rll; `Also -ottontonpi's directed? to tlieffotlthat theislotlQisfof@ lair-ger size 4 than; 'the' garootoslip'od Slpf 2li, is' A bost'f f Shown in Figure` inner surface of f the slip 27 is provided with a; :plurality foothlfodoptodito iriotonolly 'engage theL 1*' yotorsurfoo of: the? pipo Sootoodispojsod" therein.. -Aloo tho-,Slrpf is :p'rovontod' from' f boing; displaooolfromtho Slot during lili-rollo-V` screwingop'oifotoobymoons of thoitwo pinsel o Qwhioh or@ mounted in tho body-111mm, Y extend-into the opposite extremities (iii-tige"VV as @como slot 2o-4 invontoisbroflyfas follows:

: l' casing 1911l i Uponthe,teeth on ftllelloiver,end-ofthe:

. l bo'dyrlo'omng into ythe vicinity ofvtho broken; @mond QOof Pipo SootionilSithoy Willlfupo'ion' 'tofmill @Way any1-projectionsextending"outa 1 #het 1 withthe socket V10.

the pipe section,V ithxyill llie'rie-oe'ssary-- to rotate 'tlie'fseeket r`a-"elo'ckw'ise direction, "Whereas iIr-thejeoristruction shown ih Figure itrwas l necessarytof'rotate the socket ina counter- {eloclwise .diretiongdue to the fact" that that serves to Wedgetllegfpipefnseetioil',,18 to the Vconstrli'etion was especiallyr adapted for use' municating with an arcuate-shaped slot formed in its surface, an arcuate-shaped slip mounted in said slot and arranged for movementin said slot about the aXis of said body i member so that upon the rotation of the body placement therefrom, said slip being arranged to move in said slot about the aXis of the body member, whereby it will wedge a pipe to the body member to permit of the pipe being turned therewith and additional gripping means for engaging said pipe in a longitudinal direction.

8. In a device for unscrewing pipe and the like, a body member having a slot formed in the surface thereof, a slip mounted in said slot in such a manner as to prevent its lateral displacement therefrom, said slip being mov-- able in said slot about the axis of the body member, whereby it will wedge a pipe to the body member to permit of the pipe being turned therewith, and means associated with the lower end of the body member for biting into a coupling on the pipe to be unscrewed so as to permit of the coupling being removed with theV pipe.

4. In a device for unscrewing pipe and the like, a tubular body member adapted to be slid over the pipe tobe unscrewed, said body member having a slot formed in its internal surface and a slip in said slot for wedging said member upon rotation thereof to said pipe, whereby the pipe will turn therewith, said body member having its upper end formed on a slant to receive a slip for wedging'the pipe to the body member.

5. In a device for unscrewiiig pipe and the like, a tubular bodymember adapted to be slid over the pipe to be unscrewed, said body member having a slot formed in its internal surface and a slip in said slot for wedging said member upon rotation thereof to said pipe whereby the pipe will turn therewith,

said body member including a bowl member having an annular seat formed to accommodate a plurality of slips for rigidly wedging Y, the bowl member to the pipe upon the upward movement of the tubular member.

v6.In a device for removing a pipe section from a well casing and the like, a tubular member adapted to be lowered into the casing over the pipe section to be removed, a slip associated with the inner surface of the tubular member for wedging said member upon rotation thereof to the pipe section so that the pipe section may be rotated therewith, and

meanscomprising milling teeth formed upon the lower end of the tubular member for milling any projections from the pipe section during the lowering of the tubular member tliereover and also arranged to bite into the upper edge of the coupling associated with the lower end of the pipe section, whereby the coupling can be unscrewed with the pipesection. i

7. In a device for removing a pipe section from a well casing and the like, a tubular member adapted to be lowered into the casing over the pipe section to be removed, a slip associated with the inner surface of the tubular member for wedging said member upon rotation thereof to said pipe section sothat the pipe section may be rotated therewith and means comprising milling teeth formed upon the lower end of the tubular member for milling any project-ions from the pipe section during the lowering of the tubular member thereover and also arranged to bite into the upper edge of the coupling associatedwithA the lower `end of the pipe section, whereby the coupling can be unscrewed with the pipe section, said tubular member having a slanting surface for accommodating a plurality of slips adapted upon the upward movement of said member to rigidly wedge the pipe section thereto so as to allow the pipe section to be withdrawn with the tubular member.

V8. In a device for removing a pipe section from a well casing and the like, a tubular member adapted to be lowered into the casing over the pipe section to be removed, a slip associated with the inner surface of the tubular member for wedging said member upon rotation thereof to the pipe section sothat the pipe section may be rotated therewith, and lmeans comprising milling teeth formed upon the lower end of the'tubulai" member for milling any projections from the i 9. In a device for unscrewing pipe and the like, a body member having a slot formed in a surface thereof, a slip mounted in said slot in such a manner as to prevent its lateral displacement therefrom, said slip being arranged to move in said slot about the aXis of the body member, whereby it will wedge a pipe to the body member to permit of the pipe being turned therewith, means extending into said slot to prevent said slip from moving out of said slot and wedge means associated with said body member for wedgingly engaging said pipe in a longitudinal direction.

v l'10.:1Inv a devicerfor iinserewing'pipe and 'Ythe like,f a body member having-a `slot formed, e in siirfaeefthereof, l`a,s1:ipjinoiintedin'Said n K. s'lot iin Suche mannerasto preventfitS-flateral v ,A n

.'ffdisplacement thererom-,wsaid-slip being` suffi' n -Aiianizggedfoo move in said slot .abofutthe axisk of vthe bodymember,` whereby .it WillfWedge- 1 f a pipeto Vthe body member topermii; of thev pipe beingiftui'ned therewith, menne extend-1 1 10; ing'intofsaid slot'ko prevent-said slip fromlnoving out .of said` slot, Saidlzifter means# o .v ineludinga plurality fof spaced pinsgrnohintedAV Y i-n'eadbody Inembeirand extending into said slot,ij,and'Wedgefmeansj'assoeiated.with'said n A f V15g body meibefori7vedgingly enlgalging--;sa,id` v pipe in a,V longitudinal direction,

endpiiY ,pl'ing on said'pipe;Seel-i011;V f. Y 1'2. In combination Vina; devioeffoi'enfgag- ,king Ipipe 301; .the like, ai body ,Ine1nber,1 :andy i. Y

j Wedge; means eonneetedfosaid' ineinbenfoi*` y 4 Wedgingfthe body memberto a-pipe Section5.v Y. saidibodyymembeijhaving its lower end prvided Withfnieansforjrfiictionally'engaging n lo.moouplingnxsaid pipe gsectiong o v o '13511Theimethod-ofnnserewingandremove v Vinpjflapipe seetoniincludinga coupling'mem-- Y j bei' ffromfa lengthyof pipe in `a; WellwllieliVv f v consistsiinewedgingly engaging the pipe-secf j Y o 4; f f "ltiOIl n'aradial'directlion soa'stofrotate andi; Y n ilfiinslcrew saidjseoton .fireman adjacent'seef Y .-j'

v gtioin` conteinpomne'ously,Land lfijiotionally 

